When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the ...

Remember, however, that wavelength calibration will require acquisition of a CFL line spectrum before ... In this example I’ve loaded in two images, a photo of a CFL spectrum and a photo of the ...

Practice with the RSpec software required. Turn off or dim as many lights as possible. Turn on the lamp. Observe how the camera software now picks up intensity peaks at various wavelengths. Click on ...

Often a phrase is used to help remember the order of the groups of the electromagnetic spectrum such as Roman Men Invented Very Unusual X-ray Guns. Each group contains a range of frequencies.

The fact that stimulated emission generates light of the same wavelength means that the output of a laser is a very narrow spectrum, often described as 'monochromatic'. This is usually a good ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion ...

Tunable lasing at around 405 nm is realised with an InGaN device featuring a narrow-ridge active channel and a periodically ...

A Raman spectroscopy system uses a laser to illuminate a target sample and a spectrometer to detect inelastic light scattering. The scattered light is displaced in wavelength from the laser ...